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Vol.2 , No. 2, Publication Date: Apr. 3, 2015, Page: 12-19
 is a Flexible AC transmission system (FACTS) device that can control all the three system variables namely line reactance, magnitude and phase angle difference of voltage across the line. The UPFC provides a promising means to control power flow in modern power systems. Essentially the performance depends on proper control setting achievable through a power flow analysis program. This paper presents a reliable method to meet the requirements by developing a Newton-Raphson based load flow calculation through which control settings of UPFC can be determined for the pre-specified power flow between the lines. The proposed method keeps Newton-Raphson Load Flow (NRLF) algorithm intact and needs (little modification in the Jacobian matrix). A MATLAB program has been developed to calculate the control settings of UPFC and the power flow between the lines after the load flow is converged. Case studies have been performed on IEEE 5-bus system and 14-bus system to show that the proposed method is effective. These studies indicate that the method maintains the basic NRLF properties such as fast computational speed, high degree of accuracy and good convergence rate.&picture=http://www.aascit.org/aascit/decorators/img/journal/925.jpg)
| [1] | Sunil Kumar Jilledi, Department of Electrical Engineering, Adama Science and Technology University, Adama, Ethiopia. |
| [2] | Shalini J., Dairy Technology, Sri Venkateswara Veterinary University, Andhra Pradesh, India. |
| [3] | Birtukan Teshome, Department of Computing, TVET, Dangla, Ethiopia. |
Controlling power flow in modern power systems can be made more flexible by the use of recent developments in power electronic and computing control technology. The Unified Power Flow Controller (UPFC) is a Flexible AC transmission system (FACTS) device that can control all the three system variables namely line reactance, magnitude and phase angle difference of voltage across the line. The UPFC provides a promising means to control power flow in modern power systems. Essentially the performance depends on proper control setting achievable through a power flow analysis program. This paper presents a reliable method to meet the requirements by developing a Newton-Raphson based load flow calculation through which control settings of UPFC can be determined for the pre-specified power flow between the lines. The proposed method keeps Newton-Raphson Load Flow (NRLF) algorithm intact and needs (little modification in the Jacobian matrix). A MATLAB program has been developed to calculate the control settings of UPFC and the power flow between the lines after the load flow is converged. Case studies have been performed on IEEE 5-bus system and 14-bus system to show that the proposed method is effective. These studies indicate that the method maintains the basic NRLF properties such as fast computational speed, high degree of accuracy and good convergence rate.
Keywords
FACTS, Statcom, TCSC, TSSR, UPFC, Optimal Power Flow Algorithm, N-R Method
Reference
| [01] | W. L.Feng, H. W. Nagan: “control settings of Unified power flow controllers through a robust load flow calculations”, IEEE proceedings on generation, transmission and distribution. Vol146. No. 4, July 1999. |
| [02] | Nabavi-Naiki. A and iravani. M. R: “steady state and dynamic models of Unified power flow controller for power system studies”, IEEE Transactions power systems, vol. 11, no. 4, nov 1996. |
| [03] | C. R. fuerte Esquivel, Acha. E: “unified power flow controller; a critical comparison of Newton-Raphson UPFC algorithms in power flow studies” IEEE proceedings on generation, transmission, distribution, Vol143, no.5, September 1997. |
| [04] | C.R Fuerte Esquivel, Acha.E:”Newton-Raphson algorithms for the reliable solutions of large power networks with embedded FACTS devices “.IEEE proceedings on generation, transmission, distribution, Vol143, no.5,September 1996. |
| [05] | Improvement of voltage profile in power system network with svc and upfc by using optimal getntic algorithm, international journal of electrical, electronics and computer systems (ijeecs),volume 1, issue 2, april 2011. Issn: 2221-7258(print) issn: 2221-7266 (online) |
| [06] | Line Losses in the 14-Bus Power System Network using UPFC, Dr Sunil Kumar J1, Milkias Berhanu Tuka2, Dr. Sultan F. Meko3, Shalini J4 and Dawit Leykuen5, ACEEE Int. J. on Electrical and Power Engineering , Vol. 5, No. 1, February 2014 |
| [07] | Comparison of Multi-Line Power Flow Control using Unified power flow controller (UPFC) and Interline Power Flow Controller (IPFC) in Power Transmission Systems, Sunil Kumar Jilledi / International Journal of Engineering Science and Technology (IJEST), ISSN : 0975-5462 Vol. 3 No. 4 April 2011 |
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| [09] | C.L.Wadhwa “Electrical power systems”. |
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| [12] | Hadi sadhat “Power system analysis”. |
| [13] | “Modern power system analysis” by D. P. Kothari and I.J. Nagrath. |
